Variable speed mechanism



Aug 23, 1,932. i ll.. JENsEN ET AL l' 1873415 VARIABLE SPEED MECHANISM Aug. I L. JNSEI 'ET AL- l VARIABLE SPEED MECHANISM Filed sept.- 9.' 1929 s sheets-sheet 2' Aug. 23, 1932 a.. JENSEN ET AL VARIABLE SPEED MECHANISM Filed' sept. 9, 1999 5 Sheets-Sheet 5 Patented Aug. 273, 1932 UNITED: STATES PATENTOFFICE "i i* i Leurs JnNsnN AND nRnDnnrcK-c. Rnucn'nn, on onrcAGa-rnmNors, .es'sIGNons fro l Y V UNITED Auroenarnrc nnersfrnn'co., or cnrcneo, rLLrNcrs, A oonPonAif-IQN er IfnLiNoIs VARIABLE SPEED IVJECIIANISM` "Appiieation mea september 9, 1929. serial No. 391,484.

This invention relates particularly to a variable speed mechanism'. Y

The primary object is to provide an improved mechanism of the character indi- E cated. A further object is to provide'an improved variable-speed pulley' device whichl can be jeasily set for adjusted to give the' desired speed of transmission. e s The invention comprises, further, the embodiment of variable-speed mechanism in appanatus Vfor supplying continuous-form stationery and folding the same-transversely in zigfzag fashion.

Theinventioni's illustrated in a preferred embodiment in the accompanying drawings, invvhichfp A 'Figi 1l is ,a broken elevationalview showing-theA invention embodied in vapparatus comprising a folding machine and an unwind' ing machine which is actuated from the foldmachine; Vlig. 2, -a broken perspective' View `illustrating the manner in which theV stationery strips are taken from a supply roll and brought into superposed relation inl-passing vto the folding machine; Fig. 3, a broken .elevational 'view of the variable-speed pulley device :removed from the folding machine; Fig. 4, a broken, .partly sectional view of the device'shown ig. 3, the view being taken from'the left fof Fig. .3; Fig.,5, a vertical sectional view vtaken as indicated at line 5 of Fige; andFig. 6 a perspective view. of one of the adjustable segments with `wfhichthe variablespeed pulley is provided. i

In fthe illustration given, A designates a folding machine for transversely folding multiple-strip stationery; .B, a variablespeed pulley mounted on the frame of machine A and -actuatedby lthe driving mecha-` nism: thereof; fC, an unwinding machine servingas a source of supply for machine A, 'the machine C being equipped with a driving pulley fC; and l), a transmission device orV belt connectingthe variable-speed pulley B with V.the driving pulley C.

It may be statedprelimi aiiily that, accordi ing to onefmethod employed in producing Ycontinuous-form stationery,`- a web of paper is passed througha printing .press to V.print forms in parallelrolls on the web; the web is the variable-speed pulley B.

slitted to separate the continuouseforms; and

the strips are wound `upon a storagerroll. Suche roll of strips may be placed on theunwinding machine and fed tothe folding machine A, the multiple-strips-being allowed to drape or form a loop .between the twofma'f chines.

The `folding machine `Amay be any suitable construction.k Thel machine` partiallyV illustrated in Figi, is fully described in the Jensenl and 1i/Vinters application No. 377,803, led July 12, 1929. Only such description of the folding .machineas may be necessaryto the understan'dingV of the present invention will be given in thepresent application. 'i

The machine A lcomprises a frame lprovided with a strip-guidef for the paper Vstrips The frame is further equipped with a strip -guide eequipped withindividual guides for the several stripsof paper.v The strips pass from the .guided to a reciprocating distributor 5, which co-.acts with reciprocating folder-plates 6 and "7, which effect the trans` verse folding of the strips in `zig-Zag fashion.

The folded strips drop upon a transversely extendingconveyor 8 which is inclined Somewhat, the vhigh end of the conveyor being shown in Fig. l, andthe delivery endbeing at the other side of the machine.

The `disinibirtor and fassociated folding mechanism are actuated through the medium of -a driving Amechanism 9, which, in turn, is actua-ted byan. electric motor. (Not shown.) The driving mechanism -9 is shown equipped with `a .gear wheel 9 which operates The device B comprises agbr.acket,-' or mounting, 10V which "has a base' portion 10a provided with perforations 10b adapted. to

receive bolts (not shown) by means of which vthe-bracket is mounted on the frame .l a stubshaft ll liXedly mountedin the upperxpor-V tionof the bracket l0 and projecting laterally therefrom; apulley .l2 having a borevfitted with a bearing i3 journalled on the shaftfll;

peripheral ysegments lfifdisposed between flanges l5 with which the body of the pulley is provided, the segments 14C being equipped with inwardly extending stems '14a .provided at their inner ends. with. beveled heads jllb;

a series of wedge-blocks 16 mounted in slots or openings with which the pulley 12 is provided, said blocks having beveled surfaces 16L co-acting with the beveled surfaces of the heads 14?; acollarl? rigidly secured to thefpulley/ 12 fas by means of screwslra, said collar being provided with spring-sockets 17b fitted with plugs 17C; coil springs 18 housed in said sockets and opposed tothe wedgeblocks 16; a vgear 19yrigidly secured to the pulleyvl, as by meansof cap screws 19a; a

y wedge-adjusting pinion 2O having aY tapped bore engaginga threaded portion 2Oa of the stub-shaft 11; and an adjustingy shaft 21 jour'- nalied in the bracket 10, said shaft being equippedV at one end with a pinion 21a meshing with the pinion 20, and equipped at the other endwith a: fiiredly secured crank-wheel 2lb.

The. gear 19 actuates the pulley 12, and is itself actuated by the gear 9a of thefolding machine.

The bearing 13 with which the pulley is provided is confined between'collars 22 and 23 which are adj ustably fitted onthe'shaft 11. Between the'outer end of the bearing 13 and the collar 22 is interposed an Vanti-friction thrust bearing 24.

As shown in Fig.;6, each rim-segment 14 has its stem portion slidable through a collar 25 which is provided with a recess 25a. A'spring 26 is interposed between Athe collar mentioned and the head 141. The shank 14a is formed separately from the segment and` has a reduced threaded extremity which ensecured in position by a set screw 28 whose f Yto follow-the wedge-blocks.

gear 19 is shown fitted over a shoulder 30v inner end engages the recess 25a. Thus, the segment will be held inward yieldingly. EX# pansion may be effected by turning the pinionequipped nut 2O in proper direction to force the'wedge-blocks 16 inwardly.

An ,anti-.friction bearing 29 is interposed between the nut 2O and the wedge-blocks. 'Ihe gear 19 is annular, and the inner portion of the pinion 20 and the bearing 29 are of small enough diameter to permit lthe nut The annular with which the pulley 12 is provided.

In practice, the crank-equipped shaft 21 may extend across the machine A; or it may, in any event, be of sufficient length to enable the crank wheel 21b to beoperated from the side ofthe machine opposite thatA shown in Fig. 1.

The radius on which the segments 14 are struck maycorrespond with a circle about midway between the innerV and outer limits of expansion of the pulley.

The Ioll unwinding machine C comprises a frame 31; a roll-shaftr32 journalled in the lower portion of the frame; a driven feed roll 33 and a co-acting idler roll 34; a driven feed roll 35 ournalled in the upperk portion of the frame, a driven `feed roll 36 disposed rat rightY angles to the feed roll 35 and'having coacting therewith a spring-held idler' roll 37; and i obliquely extending turn-bars 38 carried by bracket-members k38a mount-edfV onr the upper and 37. Between the' machines Av and C the strips form a loop 3b. I

The pulley C is mounted on a shaft 40 connected by'beveled gears 41 to the shaft of the feed roll 33. The shaft just mentionedv is connected by a belt'42 yto vthe shaft of the" feed roll 35. The Alast-mentioned shaftis connected by beveled gears 43 Ato the shaft of the feed roll 36. f T

The turn-bars 38 are-set obliquely ata 45- angle to enable the paper .strips tobe' turned to an angle of 90 after passingover the feed roll 35. Each turn-bar is shown as comprising a flat strip 38b carried by the bracket member 38a, and a slitted tubular memberj38 fitted-on vone edge of the strip. so asto' give a rounded surface over whi-ch the paper strip is turned. l Y

In the operation ofithe apparatus illus#V trated, the paper strips areV drawninto' the distributing 'and folding mechanism ofthe folding machine by theaction of saidmechanism, ythe strips beingy drawn-from the loop 3b as required. The segments lof the variable-speed pulley B are intended to be adjusted in such Ymanner as to drive the roll .un-

winding machine at proper speed to maintainV the loop is lengthening unduly,` correction.

may be made by adjustingthe rim-segments 14 inwardly somewhat, thusslowing down ,e y the driven speed of the roll unwinding -machine. On .the other hand,*ifthe loop 3f tends to shorten, this maybe overcome by expanding the'variable-speed pulleyV somewhat, which has the effect of speeding up the operationv of the rollfunwinding machine. Y

The foregoing detailed description has been givenV for clearness of understanding only, and no unnecessary limitations' should be understood therefrom, but the appended claims should be construed as broadly as permissi-l ble, in view of the prior art. 1 What We regard'as new, and desire to se-4 cure by Letters Patent, is: i

` 1. In apparatus of the character set forth: a yroll-unwinding machine equipped with l'ao for Which said roll-unvvinding machine serves as a source of supply7 said strip folding machine being equipped With driving mechanism, and a variable-speed pulley mounted on said strip-folding machine actuated by the .driving mechanism thereof, said variablespeed pulley being connected by a flexible transmission member With said strip-feeding p mechanism.

LOUIS JENSEN. FREDERICK C. REUCKER. 

